Citation: Bo Yang, Yan Liu, Ming Li. Separation of CO₂–N₂ using zeolite NaKA with high selectivity[J]. Chinese Chemical Letters, ;2016, 27(6): 933-937. doi: 10.1016/j.cclet.2016.01.017 shu

Separation of CO₂–N₂ using zeolite NaKA with high selectivity

Department of Chemistry, Tongji University, Shanghai 200092, China

Received Date: 13 October 2015
Revised Date: 24 December 2015

The adsorption method based on solid adsorbents is one of feasible ways to capture and store CO₂. Using the ion exchange method, different zeolites NaKA varying in K+ content were produced. The adsorption isotherms and kinetic uptakes were measured. The experimental results show that the optimal NaKA could adsorb significant quantities of CO₂ and little N₂. On the zeolite NaKA with 14.7 at.% K⁺, the adsorption capacity for pure CO₂ is over 3.10 mmol g^-1 and the CO₂-N₂ selectivity is about 149 at ambient pressure and temperature. The kinetic CO₂-N₂ selectivity could also achieved 200 within 3 min according to the uptake data. To demonstrate the separation effectiveness, breakthrough curves of pure components and binary mixtures were investigated experimentally and theoretically in a fixed bed. It is found that the breakthrough points of CO₂ and N₂ are almost at the same time under the atmospheric pressure at 348 K with the raw gas composition CO₂/N₂ (20:80, v/v). If the pressure has been increased higher than 0.1 MPa, CO₂ would break through the bed much slower than N₂. Therefore, the pressure may become the limiting factor for the separation performance of zeolites NaKA.
- NaKA zeolite,
- Selectivity,
- Adsorption,
- CO₂ capture,
- Separation
1. [1]
2. [2]
3. [3]
4. [4]
5. [5]
6. [6]
7. [7]
8. [8]
9. [9]
10. [10]
11. [11]
12. [12]
13. [13]
14. [14]
15. [15]
16. [16]
17. [17]
18. [18]
1. [1]
  Congyan Liu , Xueyao Zhou , Fei Ye , Bin Jiang , Bo Liu . Confined electric field in nano-sized channels of ionic porous framework towards unique adsorption selectivity. Chinese Chemical Letters, 2025, 36(2): 109969-. doi: 10.1016/j.cclet.2024.109969
2. [2]
  Yarui Li , Huangjie Lu , Yingzhe Du , Jie Qiu , Peng Lin , Jian Lin . Highly efficient separation of high-valent actinide ions from lanthanides via fractional crystallization. Chinese Journal of Structural Chemistry, 2025, 44(4): 100562-100562. doi: 10.1016/j.cjsc.2025.100562
3. [3]
  Zixuan Zhu , Xianjin Shi , Yongfang Rao , Yu Huang . Recent progress of MgO-based materials in CO₂ adsorption and conversion: Modification methods, reaction condition, and CO₂ hydrogenation. Chinese Chemical Letters, 2024, 35(5): 108954-. doi: 10.1016/j.cclet.2023.108954
4. [4]
  Yue Li , Minghao Fan , Conghui Wang , Yanxun Li , Xiang Yu , Jun Ding , Lei Yan , Lele Qiu , Yongcai Zhang , Longlu Wang . 3D layer-by-layer amorphous MoS_x assembled from [Mo₃S₁₃]^2- clusters for efficient removal of tetracycline: Synergy of adsorption and photo-assisted PMS activation. Chinese Chemical Letters, 2024, 35(9): 109764-. doi: 10.1016/j.cclet.2024.109764
5. [5]
  Yao-Yu Ma , Wen-Juan Shi , Gang-Ding Wang , Xin Liu , Lei Hou , Yao-Yu Wang . Enhancing ethane/ethylene separation performance through the amino-functionalization of ethane-selective MOF. Chinese Chemical Letters, 2025, 36(3): 109729-. doi: 10.1016/j.cclet.2024.109729
6. [6]
  Sha-Sha Meng , Xiao-Yi Fu , Hai-Yue Wei , Ming Xu , Zhi-Yuan Gu . Improving the separation ability of MOF-based stationary phases by increasing the thermodynamic differentiation of analytes. Chinese Chemical Letters, 2025, 36(9): 110720-. doi: 10.1016/j.cclet.2024.110720
7. [7]
  Qiuting Zhang , Fan Wu , Jin Liu , Hang Su , Yanhui Zhong , Zian Lin . Facile synthesis of single-crystal 3D covalent organic frameworks as stationary phases for high-performance liquid chromatographic separation. Chinese Chemical Letters, 2025, 36(8): 110649-. doi: 10.1016/j.cclet.2024.110649
8. [8]
  Caixia Zhu , Qing Hong , Kaiyuan Wang , Yanfei Shen , Songqin Liu , Yuanjian Zhang . Single nanozyme-based colorimetric biosensor for dopamine with enhanced selectivity via reactivity of oxidation intermediates. Chinese Chemical Letters, 2024, 35(10): 109560-. doi: 10.1016/j.cclet.2024.109560
9. [9]
  Linshan Peng , Qihang Peng , Tianxiang Jin , Zhirong Liu , Yong Qian . Highly efficient capture of thorium ion by citric acid-modified chitosan gels from aqueous solution. Chinese Chemical Letters, 2024, 35(5): 108891-. doi: 10.1016/j.cclet.2023.108891
10. [10]
  Haodong Wang , Xiaoxu Lai , Chi Chen , Pei Shi , Houzhao Wan , Hao Wang , Xingguang Chen , Dan Sun . Novel 2D bifunctional layered rare-earth hydroxides@GO catalyst as a functional interlayer for improved liquid-solid conversion of polysulfides in lithium-sulfur batteries. Chinese Chemical Letters, 2024, 35(5): 108473-. doi: 10.1016/j.cclet.2023.108473
11. [11]
  Hui Liu , Baoying Xiao , Yaming Zhao , Wei Wang , Qiong Jia . Adsorption of heavy metals with hyper crosslinked polymers: Progress, challenges and perspectives. Chinese Chemical Letters, 2025, 36(8): 110619-. doi: 10.1016/j.cclet.2024.110619
12. [12]
  Jiaxuan Wang , Tonghe Liu , Bingxiang Wang , Ziwei Li , Yuzhong Niu , Hou Chen , Ying Zhang . Synthesis of polyhydroxyl-capped PAMAM dendrimer/silica composites for the adsorption of aqueous Hg(II) and Ag(I). Chinese Chemical Letters, 2024, 35(12): 109900-. doi: 10.1016/j.cclet.2024.109900
13. [13]
  Fengxing Liang , Yongzheng Zhu , Nannan Wang , Meiping Zhu , Huibing He , Yanqiu Zhu , Peikang Shen , Jinliang Zhu . Recent advances in copper-based materials for robust lithium polysulfides adsorption and catalytic conversion. Chinese Chemical Letters, 2024, 35(11): 109461-. doi: 10.1016/j.cclet.2023.109461
14. [14]
  Huazhe Wang , Chenghuan Qiao , Chuchu Chen , Bing Liu , Juanshan Du , Qinglian Wu , Xiaochi Feng , Shuyan Zhan , Wan-Qian Guo . Synergistic adsorption and singlet oxygenation of humic acid on alkali-activated biochar via peroxymonosulfate activation. Chinese Chemical Letters, 2025, 36(5): 110244-. doi: 10.1016/j.cclet.2024.110244
15. [15]
  Zimo Yang , Yan Tong , Yongbo Liu , Qianlong Liu , Zhihao Ni , Yuna He , Yu Rao . Developing selective PI3K degraders to modulate both kinase and non-kinase functions. Chinese Chemical Letters, 2024, 35(11): 109577-. doi: 10.1016/j.cclet.2024.109577
16. [16]
  Chong Liu , Nanthi Bolan , Anushka Upamali Rajapaksha , Hailong Wang , Paramasivan Balasubramanian , Pengyan Zhang , Xuan Cuong Nguyen , Fayong Li . Critical review of biochar for the removal of emerging inorganic pollutants from wastewater. Chinese Chemical Letters, 2025, 36(2): 109960-. doi: 10.1016/j.cclet.2024.109960
17. [17]
  Ping Wang , Chunmao Chen , Hongwei Ren , Erhong Duan . A review of carbon dots in synthesis strategies, photoluminescence mechanisms, and applications in wastewater treatment. Chinese Chemical Letters, 2025, 36(9): 110725-. doi: 10.1016/j.cclet.2024.110725
18. [18]
  Conghui Wang , Lei Xu , Zhenhua Jia , Teck-Peng Loh . Recent applications of macrocycles in supramolecular catalysis. Chinese Chemical Letters, 2024, 35(4): 109075-. doi: 10.1016/j.cclet.2023.109075
19. [19]
  Junyi Yu , Yin Cheng , Anhong Cai , Xianfeng Huang , Qingrui Zhang . Synthetic Cu(Ⅲ) from copper plating wastewater for onsite decomplexation of Cu(Ⅱ)- and Ni(Ⅱ)-organic complexes. Chinese Chemical Letters, 2025, 36(2): 110549-. doi: 10.1016/j.cclet.2024.110549
20. [20]
  Weidan Meng , Yanbo Zhou , Yi Zhou . Green innovation unleashed: Harnessing tungsten-based nanomaterials for catalyzing solar-driven carbon dioxide conversion. Chinese Chemical Letters, 2025, 36(2): 109961-. doi: 10.1016/j.cclet.2024.109961